#include <iostream>
using namespace std;
#include <format>
/**
 * 
 */
int main() {
  double pi = 3.14159;
  double r;
  cin >> r;
  cout << format("{:.4f} {:.4f} {:.4f}", 
  2 * r, 2 * pi * r, pi * r * r) << endl;1
  return 0;
}